diff options
Diffstat (limited to 'payloads/libpayload/drivers/pcie_mediatek.c')
-rw-r--r-- | payloads/libpayload/drivers/pcie_mediatek.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/payloads/libpayload/drivers/pcie_mediatek.c b/payloads/libpayload/drivers/pcie_mediatek.c new file mode 100644 index 0000000000..a953bd7fae --- /dev/null +++ b/payloads/libpayload/drivers/pcie_mediatek.c @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <libpayload.h> +#include <pci.h> + +#define PCIE_CFGNUM_REG 0x140 +#define PCIE_CFG_DEVFN(devfn) ((devfn) & GENMASK(7, 0)) +#define PCIE_CFG_BUS(bus) (((bus) << 8) & GENMASK(15, 8)) +#define PCIE_CFG_OFFSET_ADDR 0x1000 +#define PCIE_CFG_HEADER(bus, devfn) \ + (PCIE_CFG_BUS(bus) | PCIE_CFG_DEVFN(devfn)) + +uintptr_t pci_map_bus(pcidev_t dev) +{ + u32 devfn = (PCI_SLOT(dev) << 3) | PCI_FUNC(dev); + u32 val = PCIE_CFG_HEADER(PCI_BUS(dev), devfn); + write32((void *)(lib_sysinfo.pcie_ctrl_base + PCIE_CFGNUM_REG), val); + + return lib_sysinfo.pcie_ctrl_base + PCIE_CFG_OFFSET_ADDR; +} |